The hex color #ff3f0b is a dark color. The web-safe version is Hex
#FF3300. A complementary color is
#00C0F4. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#FF723E, and Hex
#CC0C00 is the 20% darker color. If the color is saturated by 10%, you get
#FF3A01. If the color is desaturated by 10%, the color
#F04415 is obtained.